Fireproof plaster-board.



2 Sheets-Shee't I.

P. RYAN. FIBEPHOF PLASTER BOARD.

n nefkd AToHA/Ey's Patented May 8, |900.

P. RYAN. FIREPROOF PLASTER EGARD.'

(Application filed Ian. 3, 1900.)

2 Sheets-Sheet 2.

(No Windel.)

W/ TNE SSE S nTTnn dTaTns l'daTnnT Triton,

PATRICK RYAN, OF NEXV YORK, N. Y.

FIREPRQF PLAS'E'EREGARD.`

SPECIFICATION forming part of Letters Patent No. 649,363, dated May 8, 1900. Application filed January 3, 1900. Serial No. 241. (No modelJ To all wtont it 71mg/ cancelar:

Be it known that I, PATRICK RYAN, a ci iizen of the United States, and a resident of the city of New York, borough of Manhattan, in the county and State of New York, have invented a neWand Improved Fireproof Plaster-Board, of which the followingis a full, clear, and eX- act description.

This invention relates to fireproof coverings for the sides and ceilings of rooms in a building, and has for its object to provide a novel, convenient, and inexpensive heat resisting substitute for wood or metal laths and plaster commonly employed in the formation of side Walls and ceilings of rooms.

The improvement, which is in the form of a rectangular-edged board formed of alternate layers offireproofedpaper or its equivalent and a suitable plaster coated thereon, when applied by nailing the boards in place affords a smooth continuous covering for the -Joists and studding of a room, is non-combusf tible, and impervious to air, dust, or vermin.

The invention consists in the novel construction and combination of parts, as is hereinafterdescribed,and defined in the appended claim.

In the drawings forming a part of fication, and which illustrate the specific construction of the improvement, similar characters of reference indicate corresponding parts in all the views.

f Figure l is a perspective view4 showing the application of the. improvement to studding forming portions of a side wall. Fig. 2 is an enlarged exterior viewof one of the improved plastenboards. Fig. 3 is a sectional side view of the same substantially on the line 3 3 in Fig. 4. Fig. 4 is a transverse sectional view substantially on the line 4,4-in Fig. 2. Fig. 5 is an enlarged transverse sectional view showinginteriordetails of construction of the plaster-board represented in Fig. 4. Fig. 6 is a side elevation of plaster-boards secured imposition on studding and having further details of improvement, and Fig. 7 is a transverse sectional view substantially on the line 7 7 in Fig. G.

Briefly described, the improvement consists this speci-l of paper, cardboard, orfibrous fabric, if this is preferred, and coating the interior sheets the plaster-board, and thus bind the paper vsheets and plaster coatings together, so that.

when dried the plaster-board will become a hard durable heat-resisting covering, which may be secured by nails or screws in place on the timber-supports that are portions of the framework of a building.

The paper sheets 6, that are coated with the .plaster material 7, may be and preferably are five in number, as shown in the drawings; but it is to be understood that this number may be increased or decreased, if desired. The paper sheets 6 may be all perforated, as indicated ata and b in Figs. l, 3, 4, and 5, or

the exterior sheets (ifL (shown in Figs. 6 and 7) maybe devoid of perforations, except at b, along the side edges of the same to permit nails b to be readily driven through theplas- .ter-boards when the boards are to be secured in place on ceiling-joists(uot shown) or 'uponstudding A, as indicated in Figs. 1 and 6.

vThe sheets of paper or fabric,l if this is p referred, should be thoroughly saturated with any available freproofing liquid and dried previously to their manufacture into theimproved plaster-boards, thus rendering'these portions of the composite Wall material proof against combustion by accident.

The plastic material used to coat the paper sheets maybe a composition of different ingredients; but it must be non-liable to combustion. y

In thefcourse of manufacture the edges of each plaster-board are rendered true and at right angles to each other, and preferably the plaster-boards are of similar dimensions.

A series of ,perforatio'ns b, previously mentioned, extend along each side edge of a plaster-board and are suitably spaced'apart,'so

that the boards in complete form may be quickly secured in position by use of nails b' driven through the perforations b and then into the timbers that are to support them.

IOC

' tute for.ordinary sidewall and ceiling ma- 4.to dust, air-currents,for the passage of anyA IE desired, the dimensions of the plasterl While I give preferenceto the use of paper boards may be increased to engage with more in the manufacture'of the improved plasterthanvtwo of the studs'A and be secured thereboards, I do not desire to connethe invenon; but preferably the size of each plastertion to such material, as I may employ heavy board is such as will permit it to engag with cardboard or use coarse `cloth that has been two adjacent studs A and extend half-way. made ireproof; and Irmay also useasbestos across each stud, as indicated in Figs. 1, 6, paper or cardboard, and thus dispense with and 7 so that two plaster-boards may have the ireproofiug of the paper; but if the paper their adjacent side edges seated upon each is not made of anaturally-heat-resisting mastud or joist of a building Which they are to terial it must be rendered so by application cover, and thus aord a continuons side Wall of a suitable liquid, as before explained. or ceiling. Having thus described my invention, I

As shown in Figs. 6 and 7, I `prefer to form spaced scallops or notches a at intervalsin each side edge of a rectangular plaster-board, these scallops being adapted to oppose each other in pairs, so as to produce openings between adjoining plaster-boards after they are in place, said openings being adapted to receive plaster material that is applied as a 'finishing coating for the side wall or ceiling of a'room, and thus vserve to hold the finishing coating bound'upon the plaster-boards.

It will be seen that the improved substi- As a new article of` manufacture, a building board or block consisting of superimposed layers of plaster and paper of equal size and shape, thc paper being formed with perfora-y tions therein .into which the plaster may eX- tend, and the whole forming a solid block or board capable of being fastened in place in Vthe building. y

In testimony whereof I have signed my name to thisspecification in the presence of two subscribing witnesses. terial provides a smooth side Wall or ceiling IA'lvll CK RYAN. that is solid and hard as Well as impervious Witnesses: Y

WM. I. PA'rToN,

kind-of vermin from one room to another. JNO. M. RITTER.

claim aswnew and desire to secure by Letters 

